In plumbing, a metal cylinder with a removable cap calked to a waste- or drain-pipe to facilitate its being cleaned out when stopped: as, a brass clean-out.(noun)
The Century Dictionary (Public Domain)
Use "clean-out" in a sentence
"How else will ordinary Egyptians swell the numbers in the streets and so achieve a proper clean-out of the upper echelons of this rotten regime."
"You can see why an experienced clean-out crew would be flummoxed by this two-sided mailbox, right?"
"It seems that Bank Of America, an institution known for the mass-manufacture of foreclosure errors that also occasionally dabbles in a little personal banking, sent a foreclosure "clean-out crew" out to a condominium at 4255 W."